JP6766029B2 - Heat transfer device and heat transfer method using it - Google Patents
Heat transfer device and heat transfer method using it Download PDFInfo
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- JP6766029B2 JP6766029B2 JP2017235784A JP2017235784A JP6766029B2 JP 6766029 B2 JP6766029 B2 JP 6766029B2 JP 2017235784 A JP2017235784 A JP 2017235784A JP 2017235784 A JP2017235784 A JP 2017235784A JP 6766029 B2 JP6766029 B2 JP 6766029B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
Description
本発明は、熱搬送装置及びそれを用いた熱搬送方法に関する。 The present invention relates to a heat transfer device and a heat transfer method using the heat transfer device.
ＨＦＣ−１２５、ＨＦＣ−３２等のハイドロフルオロカーボン「ＨＦＣ」は、オゾン層を破壊する物質として知られるクロロフルオロカーボン「ＣＦＣ」、ハイドロクロロフルオロカーボン「ＨＣＦＣ」等に替わる重要な代替物質として広く用いられている。このような代替物質として、ＨＦＣ−３２とＨＦＣ−１２５との混合物である「Ｒ−４１０Ａ」や、ＨＦＣ−１２５、ＨＦＣ−１３４ａ及びＨＦＣ−１４３ａの混合物である「Ｒ−４０４Ａ」等が知られている。 Hydrofluorocarbons "HFCs" such as HFC-125 and HFC-32 are widely used as important alternatives to chlorofluorocarbons "CFC" and hydrochlorofluorocarbons "HCFC", which are known to destroy the ozone layer. .. As such alternative substances, "R-410A" which is a mixture of HFC-32 and HFC-125, "R-404A" which is a mixture of HFC-125, HFC-134a and HFC-143a and the like are known. ing.
上記代替物質は、例えば、熱媒体、冷媒、発泡剤、溶媒、洗浄剤、噴射剤、消火剤等、多岐にわたる用途に利用されており、消費量も多い。一方で、上記物質はいずれもＣＯ２の数千倍の地球温暖化係数（いわゆる「ＧＷＰ」と称される）を有するため、これらの物質の拡散によって地球温暖化におよぼす影響が大きいことが懸念されている。 The above alternative substances are used in a wide range of applications such as heat media, refrigerants, foaming agents, solvents, cleaning agents, propellants, fire extinguishing agents, and the like, and their consumption is large. On the other hand, since all of the above substances have a global warming potential (so-called "GWP") that is several thousand times that of CO 2 , there is concern that the diffusion of these substances will have a large effect on global warming. Has been done.
この地球温暖化対策として、使用後の物質回収が行われているが、すべてを回収できるわけではなく、漏洩による拡散も無視できない。冷媒や熱媒体の用途においては、ＣＯ２や炭化水素系物質による代替も検討されているが、ＣＯ２冷媒は高温雰囲気下での冷凍効率が十分でなく、機器も大型化するため課題が多い。また、炭化水素系物質はその燃焼性の高さから安全性の面で問題が残る。 As a measure against global warming, substances are recovered after use, but not all of them can be recovered, and diffusion due to leakage cannot be ignored. In the use of refrigerants and heat media, alternatives to CO 2 and hydrocarbon substances are being considered, but CO 2 refrigerants do not have sufficient freezing efficiency in high temperature atmospheres, and there are many problems because the equipment becomes large. .. In addition, hydrocarbon-based substances have a problem in terms of safety due to their high flammability.
上記問題を解決する物質として、現在ではＧＷＰの低いハイドロハロオレフィンが注目されている。ハイドロハロオレフィンは、水素、ハロゲン（フッ素、塩素等）を含む不飽和炭化水素の総称であり、例えば、以下の化学式で示される物質が含まれる。なお、化学式の後のカッコ内は、冷媒分野で汎用されている冷媒番号を示す（幾何異性体を含む）。ＣＦ３ＣＦ＝ＣＦ２ （ＨＦＯ−１２１６ｙｃ）
ＣＦ３ＣＦ＝ＣＨＦ （ＨＦＯ−１２２５ｙｅ）
ＣＦ３ＣＦ＝ＣＨ２ （ＨＦＯ−１２３４ｙｆ）
ＣＦ３ＣＨ＝ＣＨＦ （ＨＦＯ−１２３４ｚｅ）
ＣＦ３ＣＨ＝ＣＨ２ （ＨＦＯ−１２４３ｚｆ）
ＣＦ３ＣＣｌ＝ＣＨ２ （ＨＣＦＯ−１２３３ｘｆ）
ＣＦ２ＣｌＣＣｌ＝ＣＨ２ （ＨＣＦＯ−１２３２ｘｆ）
ＣＦ３ＣＨ＝ＣＨＣｌ （ＨＣＦＯ−１２３３ｚｄ）
ＣＦ３ＣＣｌ＝ＣＨＣｌ （ＨＣＦＯ−１２２３ｘｄ）
ＣＣｌＦ２ＣＣｌ＝ＣＨＣｌ （ＨＣＦＯ−１２２２ｘｄ）
ＣＦＣｌ２ＣＣｌ＝ＣＨ２ （ＨＣＦＯ−１２３１ｘｆ）
ＣＨ２ＣｌＣＣｌ＝ＣＣｌ２ （ＨＣＯ−１２３０ｘａ）
これらの中でも特にフルオロプロペンは、低ＧＷＰの冷媒、熱媒体の候補として有望な物質であるが、時間の経過などにより徐々に分解が生じることがあり、安定性が高い物質であるとはいえない。そのため、このような物質を種々の用途に使用するにあたっては、その使用状況又は使用環境によって性能が徐々に低下する等の問題がある。そして、このような性能の低下は、冷媒に空気（酸素）が混入した場合に特に問題となる。
At present, hydrohaloolefins having a low GWP are attracting attention as substances that solve the above problems. Hydrohaloolefin is a general term for unsaturated hydrocarbons containing hydrogen and halogens (fluorine, chlorine, etc.), and includes, for example, substances represented by the following chemical formulas. The numbers in parentheses after the chemical formula indicate the refrigerant numbers that are widely used in the refrigerant field (including geometric isomers). CF 3 CF = CF 2 (HFO-1216yc)
CF 3 CF = CHF (HFO-1225ye)
CF 3 CF = CH 2 (HFO-1234yf)
CF 3 CH = CHF (HFO-1234ze)
CF 3 CH = CH 2 (HFO-1243zf)
CF 3 CCl = CH 2 (HCFO-1233xf)
CF 2 ClCCl = CH 2 (HCFO-1232xf)
CF 3 CH = CHCl (HCFO-1233zd)
CF 3 CCl = CHCl (HCFO-1223xd)
CClF 2 CCl = CCHCl (HCFO-1222xd)
CFCl 2 CCl = CH 2 (HCFO-1231xf)
CH 2 ClCCl = CCl 2 (HCO-1230xa)
Among these, fluoropropene is a promising substance as a candidate for a low GWP refrigerant and heat medium, but it cannot be said to be a highly stable substance because it may gradually decompose over time. .. Therefore, when such a substance is used for various purposes, there is a problem that the performance gradually deteriorates depending on the usage condition or the usage environment. Then, such a decrease in performance becomes a particular problem when air (oxygen) is mixed in the refrigerant.
一般に、モバイルエアコンのように工場で冷媒が充填される装置であれば、施工管理がなされているため空気（酸素）の混入の可能性はほとんどない。しかしながら、定置式空調機などの装置は、設置現場での冷媒充填施工が必要である。冷媒充填施工は、施工業者の管理能力に委ねられており、これまでも冷凍能力低下などの不具合やトラブルの主原因として空気（酸素）の混入が考えられている。 Generally, if the device is filled with a refrigerant at a factory such as a mobile air conditioner, there is almost no possibility of air (oxygen) being mixed in because the construction is controlled. However, devices such as stationary air conditioners require refrigerant filling work at the installation site. Refrigerant filling construction is left to the management ability of the contractor, and air (oxygen) has been considered to be the main cause of problems and troubles such as a decrease in refrigerating capacity.
また、従来の低圧冷媒ＨＣＦＣ−１２３を用いた圧縮機システム（ターボ冷凍機）の運転制御方法では、系内が負圧になるために冷凍システムの運転中に外部から空気が系内に混入するリスクがあったが、ＨＣＦＣをハイドロハロオレフィンに換えた場合でも同様のリスクがあると考えられる。 Further, in the operation control method of the compressor system (turbo chiller) using the conventional low-pressure refrigerant HCFC-123, air is mixed into the system from the outside during the operation of the refrigeration system because the pressure inside the system becomes negative. Although there was a risk, it is considered that there is a similar risk even if HCFC is replaced with a hydrohaloolefin.
更に、近年では、圧縮機において冷媒を圧縮する圧縮部を駆動するモーターの回転軸を支持する軸受として磁気軸受、セラミック軸受又は空気軸受を採用することにより、冷媒１００重量部に対する冷凍機油の使用量を５重量部以下に制限したいわゆるオイルフリーの装置も開発されている。これによれば、冷凍機油の交換などに関連するコスト及びメンテナンスの負荷を軽減できるほか、冷凍機油に溶けた冷媒の大気への放出も回避できる。しかしながら、冷凍機油に起因する影響は低減できるが、冷媒に空気（酸素）が混入した場合にハイドロハロオレフィンが徐々に分解するおそれはある。 Furthermore, in recent years, by adopting magnetic bearings, ceramic bearings or air bearings as bearings that support the rotating shaft of the motor that drives the compressor that compresses the refrigerant in the compressor, the amount of refrigerating machine oil used for 100 parts by weight of the refrigerant is used. So-called oil-free devices have also been developed that limit the amount to 5 parts by weight or less. According to this, it is possible to reduce the cost and maintenance load related to the replacement of the refrigerating machine oil, and it is possible to avoid the release of the refrigerant dissolved in the refrigerating machine oil into the atmosphere. However, although the influence caused by the refrigerating machine oil can be reduced, there is a possibility that the hydrohaloolefin is gradually decomposed when air (oxygen) is mixed in the refrigerant.
従来のＨＦＣ及びＨＣＦＣ冷媒では、このような不具合が発生した場合は、冷媒の入れ替えのみで対応可能であったが、ハイドロハロオレフィンを含む冷媒の場合には冷媒の酸化分解により酸を生成する可能性があるため、装置の金属腐食が生じるおそれがあり、それに伴い機器の交換の必要も考えられる。 With conventional HFC and HCFC refrigerants, when such a problem occurs, it can be dealt with only by replacing the refrigerant, but in the case of a refrigerant containing hydrohaloolefin, acid can be generated by oxidative decomposition of the refrigerant. Due to this property, metal corrosion of the equipment may occur, and it may be necessary to replace the equipment accordingly.
本発明は、ハイドロハロオレフィンを含有する冷媒が循環経路に封入された熱搬送装置であって、循環経路に混入した酸素の影響を抑制することができる熱搬送装置及びそれを用いた熱搬送方法を提供することを目的とする。 The present invention is a heat transfer device in which a refrigerant containing a hydrohaloolefin is sealed in a circulation path, a heat transfer device capable of suppressing the influence of oxygen mixed in the circulation path, and a heat transfer method using the same. The purpose is to provide.
本発明者らは、上記目的を達成すべく鋭意研究を重ねた結果、冷媒の循環経路における特定領域に酸素吸着器を備えた熱搬送装置によれば、上記目的を達成できることを見出し、本発明を完成するに至った。 As a result of diligent research to achieve the above object, the present inventors have found that the above object can be achieved by a heat transfer device provided with an oxygen adsorbent in a specific region in the circulation path of the refrigerant, and the present invention has been made. Has been completed.
即ち、本発明は、下記の熱搬送装置及びそれを用いた熱搬送方法に関する。
１．ハイドロクロロフルオロオレフィン（ＨＣＦＯ）を含有する冷媒が循環経路に封入された熱搬送装置であって、
前記熱搬送装置は、チラーで且つターボ冷凍機であり、
前記装置は、前記循環経路の主回路において、前記主回路に存在する蒸発器と圧縮機との間で且つその循環経路外に対して負圧になる領域に酸素吸着器を備え、
更に前記主回路における前記酸素吸着器の前後に前記酸素吸着器が前記主回路に対して脱着自在となるようにバルブを備える、
ことを特徴とする熱搬送装置。
２．前記酸素吸着器は、金属酸化物系酸素吸着材及び有機系（糖系）酸素吸着材の少なくとも一種を含有する、上記項１に記載の熱搬送装置。
３．前記循環経路における酸素含有量が０．１体積％以下である、上記項１又は２に記載の熱搬送装置。
４．前記循環経路には前記冷媒に加えて冷凍機油が含有されており、前記冷媒１００重量部に対する前記冷凍機油の含有量が５重量部以下である、上記項１〜３のいずれかに記載の熱搬送装置。
５．前記主回路に存在する圧縮機の前記冷媒を圧縮する圧縮部を駆動するモーターの回転軸を支持する軸受が磁気軸受、セラミック軸受又は空気軸受である、上記項４に記載の熱搬送装置。
６．上記項１に記載の熱搬送装置の前記循環経路に前記冷媒を循環させることを特徴とする熱搬送方法。
That is, the present invention relates to the following heat transfer device and a heat transfer method using the following device.
1. 1. A heat transfer device in which a refrigerant containing hydrochlorofluoroolefin (HCFO) is sealed in a circulation path.
The heat transfer device is a chiller and a turbo chiller.
The device, in the main circuit of the circulation path, and Bei example oxygen adsorber in a region to be a negative pressure with respect to the circulation path out between the evaporator and compressor present in the main circuit,
Further, a valve is provided before and after the oxygen adsorber in the main circuit so that the oxygen adsorber can be attached to and detached from the main circuit.
A heat transfer device characterized in that.
2. Item 2. The heat transfer device according to Item 1, wherein the oxygen adsorber contains at least one of a metal oxide-based oxygen adsorbent and an organic (sugar-based) oxygen adsorbent.
3 . Item 2. The heat transfer device according to Item 1 or 2 , wherein the oxygen content in the circulation path is 0.1% by volume or less.
4 . Item 3. The heat according to any one of Items 1 to 3 , wherein the circulation path contains refrigerating machine oil in addition to the refrigerant, and the content of the refrigerating machine oil with respect to 100 parts by weight of the refrigerant is 5 parts by weight or less. Conveyor device.
5 . Item 4. The heat transfer device according to Item 4, wherein the bearing that supports the rotating shaft of the motor that drives the compression unit that compresses the refrigerant of the compressor existing in the main circuit is a magnetic bearing, a ceramic bearing, or an air bearing.
6 . The heat transfer method, characterized in that the refrigerant is circulated in the circulation path of the heat transfer device according to the above item 1.
本発明の熱搬送装置及びそれを用いた熱搬送方法は、冷媒の循環経路における特定領域に酸素吸着器を備えた熱搬送装置を用いることにより、循環経路に混入した酸素を酸素吸着器で除去することができるため、冷媒に対する酸素の影響を抑制することができる。 In the heat transfer device of the present invention and the heat transfer method using the same, oxygen mixed in the circulation path is removed by the oxygen adsorber by using the heat transfer device provided with the oxygen adsorber in a specific region in the circulation path of the refrigerant. Therefore, the influence of oxygen on the refrigerant can be suppressed.
本発明の熱搬送装置
本発明の熱搬送装置は、ハイドロハロオレフィンの中でも、特にハイドロフルオロオレフィン（以下「ＨＦＯ」ともいう）、ハイドロクロロフルオロオレフィン（以下「ＨＣＦＯ」ともいう）及びハイドロクロロオレフィン（以下「ＨＣＯ」ともいう）からなる群から選択される少なくとも一種を含有する冷媒が循環経路に封入された熱搬送装置であって、大別すると下記実施形態１及び実施形態２の二種類に分けることができる。
Heat transfer device of the present invention Among the hydrohaloolefins, the heat transfer device of the present invention particularly includes hydrofluoroolefin (hereinafter, also referred to as “HFO”), hydrochlorofluoroolefin (hereinafter, also referred to as “HCFO”), and hydrochloroolefin (hereinafter, also referred to as “HCFO”). A heat transfer device in which a refrigerant containing at least one selected from the group consisting of (hereinafter, also referred to as “HCO”) is sealed in a circulation path, and is roughly classified into the following two types, the first embodiment and the second embodiment. be able to.
（実施形態１）ハイドロフルオロオレフィン（ＨＦＯ）、ハイドロクロロフルオロオレフィン（ＨＣＦＯ）及びハイドロクロロオレフィン（ＨＣＯ）からなる群から選択される少なくとも一種を含有する冷媒が循環経路に封入された熱搬送装置であって、
前記循環経路に存在する蒸発器と圧縮機との間に酸素吸着器を備える、
ことを特徴とする熱搬送装置。
(Embodiment 1) A heat transfer device in which a refrigerant containing at least one selected from the group consisting of hydrofluoroolefin (HFO), hydrochlorofluoroolefin (HCFO) and hydrochloroolefin (HCO) is sealed in a circulation path. There,
An oxygen adsorber is provided between the evaporator and the compressor existing in the circulation path.
A heat transfer device characterized in that.
（実施形態２）ハイドロフルオロオレフィン（ＨＦＯ）、ハイドロクロロフルオロオレフィン（ＨＣＦＯ）及びハイドロクロロオレフィン（ＨＣＯ）からなる群から選択される少なくとも一種を含有する冷媒が循環経路に封入された熱搬送装置であって、
前記装置は、前記循環経路中、圧力１．０ＭＰａ以下の領域に酸素吸着器を備える、
ことを特徴とする熱搬送装置。
(Embodiment 2) A heat transfer device in which a refrigerant containing at least one selected from the group consisting of hydrofluoroolefin (HFO), hydrochlorofluoroolefin (HCFO) and hydrochloroolefin (HCO) is sealed in a circulation path. There,
The apparatus includes an oxygen adsorber in a region where the pressure is 1.0 MPa or less in the circulation path.
A heat transfer device characterized in that.
以下、実施形態１及び２に分けて説明する。 Hereinafter, the first and second embodiments will be described separately.
≪実施形態１の熱搬送装置≫
実施形態１の熱搬送装置は、ＨＦＯ、ＨＣＦＯ及びＨＣＯからなる群から選択される少なくとも一種を含有する冷媒が循環経路に封入された熱搬送装置であって、
前記循環経路に存在する蒸発器と圧縮機との間に酸素吸着器を備える、
ことを特徴とする。
<< Heat Transfer Device of Embodiment 1 >>
The heat transfer device of the first embodiment is a heat transfer device in which a refrigerant containing at least one selected from the group consisting of HFO, HCFO and HCO is sealed in a circulation path.
An oxygen adsorber is provided between the evaporator and the compressor existing in the circulation path.
It is characterized by that.
冷媒としては、ＨＦＯ、ＨＣＦＯ及びＨＣＯからなる群から選択される少なくとも一種を含有すればよく、ＨＦＯとしては、例えば、２，３，３，３−テトラフルオロプロペン（ＨＦＯ−１２３４ｙｆ）、１，３，３，３−テトラフルオロプロペン（ＨＦＯ−１２３４ｚｅ）、１，２，３，３−テトラフルオロプロペン（ＨＦＯ−１２３４ｙｅ）、１，１，２，３−テトラフルオロプロペン（ＨＦＯ−１２３４ｙｃ）、１，２，３，３，３−ペンタフルオロプロペン（ＨＦＯ−１２２５ｙｅ）、１，１，３，３，３−ペンタフルオロプロペン（ＨＦＯ−１２２５ｚｃ）、３，３，３−トリフルオロプロペン（ＨＦＯ−１２４３ｚｆ）、１，１，１，４，４，４−ヘキサフルオロ−２−ブテン（ＨＦＯ−１３３６ｍｚｚ）、１，１，１，２，４，４，５，５，５−ノナフルオロペンテン（ＨＦＯ−１４２９ｍｙｚ）等が挙げられる。 The refrigerant may contain at least one selected from the group consisting of HFO, HCFO and HCO, and the HFO includes, for example, 2,3,3,3-tetrafluoropropene (HFO-1234yf), 1,3. , 3,3-Tetrafluoropropene (HFO-1234ze), 1,2,3,3-tetrafluoropropene (HFO-1234ye), 1,1,2,3-tetrafluoropropene (HFO-1234yc), 1, 2,3,3,3-pentafluoropropene (HFO-1225ye), 1,1,3,3,3-pentafluoropropene (HFO-1225zc), 3,3,3-trifluoropropene (HFO-1243zf) , 1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz), 1,1,1,2,4,4,5,5-nonafluoropentene (HFO-1429myz) ) Etc. can be mentioned.
ＨＣＦＯとしては、例えば、２−クロロ−３，３，３−トリフルオロプロペン（ＨＣＦＯ−１２３３ｘｆ）、２，３−ジクロロ−３，３−ジフルオロプロペン（ＨＣＦＯ−１２３２ｘｆ）、１−クロロ−３，３，３−トリフルオロプロペン（ＨＣＦＯ−１２３３ｚｄ）、２−クロロ−３，３，３−トリフルオロプロペン（ＨＣＦＯ−１２３３ｘｆ）、２，３−ジクロロ−３，３−ジフルオロプロペン（ＨＣＦＯ−１２３２ｘｆ）、１，２−ジクロロ−３，３，３−トリフルオロプロペン（ＨＣＦＯ−１２２３ｘｄ）、１，２，３−トリクロロ−３，３−ジフロロプロペン（ＨＣＦＯ−１２２２ｘｄ）、２，３，３−トリクロロ−３−フルオロプロペン（ＨＣＦＯ−１２３１ｘｆ）等が挙げられる。 Examples of HCFO include 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 2,3-dichloro-3,3-difluoropropene (HCFO-1232xf), 1-chloro-3,3. , 3-Trifluoropropene (HCFO-1233zd), 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 2,3-dichloro-3,3-difluoropropene (HCFO-1232xf), 1 , 2-Dichloro-3,3,3-trifluoropropene (HCFO-1223xd), 1,2,3-trichloro-3,3-difluoropropene (HCFO-1222xd), 2,3,3-trichloro-3 -Fluoropropene (HCFO-1231xf) and the like can be mentioned.
ＨＣＯとしては、例えば、１，３，３，３−テトラクロロプロペン（ＨＣＯ−１２３０ｚｄ）、１，１，２，３−テトラクロロプロペン（ＨＣＯ−１２３０ｘａ）、１，１，３，３−テトラクロロプロペン（ＨＣＯ−１２３０ｚａ）、２，３，３，３−テトラクロロプロペン（ＨＣＯ−１２３０ｘｆ）等が挙げられる。 Examples of HCO include 1,3,3,3-tetrachloropropene (HCO-1230zd), 1,1,2,3-tetrachloropropene (HCO-1230xa), and 1,1,3,3-tetrachloro. Propene (HCO-1230za), 2,3,3,3-tetrachloropropene (HCO-1230xf) and the like can be mentioned.
これらのＨＦＯ、ＨＣＦＯ及びＨＣＯは、それぞれ単独で又は二種以上を混合して使用できる。また、ＨＦＯ、ＨＣＦＣ及びＨＣＯ以外に他の冷媒を混合することも可能であり、その場合には、冷媒混合物中のＨＦＯ、ＨＣＦＯ及びＨＣＯの総量が５０重量％以上となるように設定することが好ましい。 These HFOs, HCFOs and HCOs can be used alone or in admixture of two or more. Further, it is possible to mix other refrigerants other than HFO, HCFC and HCO, and in that case, the total amount of HFO, HCFO and HCO in the refrigerant mixture may be set to 50% by weight or more. preferable.
他の冷媒としては、例えば、ＨＦＣ−３２、ＨＦＣ−４１、ＨＦＣ−１２５、ＨＦＣ−１３４、ＨＦＣ−１４３、ＨＦＣ−１５２、ＨＦＣ−２２７、ＨＦＣー２３６、ＨＦＣ２４５、ＨＦＣ−３３８、ＨＦＣ−３４７、ＨＦＣ−３５６、ＨＦＣ−３６５、ＨＦＣ−４４９、ＨＦＣ−４３-１０、ＨＦＥ−１２５、ＨＦＥ−１３４、ＨＦＥ−１４３、ＨＦＥ−１５２、ＨＦＥ−２３６、ＨＦＥ−２４５、ＨＦＥ−２５４、ＨＦＥ−３３８、ＨＦＥ−３４７、ＨＦＥ−３５６、ＨＦＥ−３６５、ＨＦＥ−４４９等が挙げられる。また、異性体を有するものについては異性体も含まれる。更には、炭素数１〜５の炭化水素（異性体を有するものについては異性体も含まれる）、ＣＯ２等も挙げられる。これらの他の冷媒は１種又は２種以上を含んでもよい。 Examples of other refrigerants include HFC-32, HFC-41, HFC-125, HFC-134, HFC-143, HFC-152, HFC-227, HFC-236, HFC245, HFC-338, HFC-347, HFC-356, HFC-365, HFC-449, HFC-43-10, HFE-125, HFE-134, HFE-143, HFE-152, HFE-236, HFE-245, HFE-254, HFE-338, Examples thereof include HFE-347, HFE-356, HFE-365, and HFE-449. In addition, isomers are also included if they have isomers. Further, hydrocarbons having 1 to 5 carbon atoms (including isomers if they have isomers), CO 2 and the like can also be mentioned. These other refrigerants may contain one or more.
上記、ＨＦＯ、ＨＣＦＯ及びＨＣＯからなる群から選択される少なくとも一種と他の冷媒との混合物としては、Ｒ−４４４Ａ、Ｒ−４４４Ｂ、Ｒ−４４５Ａ、Ｒ−４４６Ａ、Ｒ−４４７Ａ、Ｒ−４４８Ａ、Ｒ−４４９Ａ、Ｒ−４４９Ｂ、−４５０Ａ、−４５１ａ、Ｒ−４５１Ｂ、Ｒ−４５２Ａ、Ｒ−４５４Ａ、Ｒ−４５４Ｂ、Ｒ−４５５Ａ、Ｒ−５１３Ａ、Ｒ−５１３Ｂ等が挙げられる。 Examples of the mixture of at least one selected from the group consisting of HFO, HCFO and HCO and other refrigerants include R-444A, R-444B, R-445A, R-446A, R-447A and R-448A. Examples thereof include R-449A, R-449B, -450A, -451a, R-451B, R-452A, R-454A, R-454B, R-455A, R-513A, and R-513B.
なお、本発明では、循環経路に封入された冷媒（又は冷媒混合物）は、ＨＦＯ、ＨＣＦＯ及びＨＣＯからなる群から選択される少なくとも一種のみから構成されていてもよい。 In the present invention, the refrigerant (or refrigerant mixture) sealed in the circulation path may be composed of at least one selected from the group consisting of HFO, HCFO and HCO.
本発明の熱搬送装置は、上記ＨＦＯ、ＨＣＦＯ及びＨＣＯの少なくとも一種を含有する冷媒（冷媒混合物の場合も以下「冷媒」と略記する）が装置内の冷媒の循環経路に封入されており、循環経路に配置されている各機器を通過することによって熱搬送を行う。 In the heat transfer device of the present invention, a refrigerant containing at least one of the above HFO, HCFO and HCO (also abbreviated as "refrigerant" in the case of a refrigerant mixture) is sealed in the circulation path of the refrigerant in the device and circulates. Heat transfer is performed by passing through each device arranged in the path.
本発明の熱搬送装置は、その用途は限定的ではなく、例えば、空気調和装置（モバイルエアコン、家庭用エアコン、業務用エアコン）冷凍機、冷蔵庫、冷却機（チラー）、コンテナ用冷凍装置、給湯器等の熱搬送に関連する機器が広く挙げられる。以下では、本発明の熱搬送装置の具体例として、上記圧縮式熱搬送装置の一つである空気調和装置（図１参照）及びターボ冷凍機（図２参照）について例を挙げて説明する。 The use of the heat transfer device of the present invention is not limited, and for example, an air conditioner (mobile air conditioner, household air conditioner, commercial air conditioner) refrigerator, refrigerator, cooler (chiller), container refrigerator, hot water supply. Equipment related to heat transfer such as a vessel is widely mentioned. In the following, as specific examples of the heat transfer device of the present invention, an air conditioner (see FIG. 1) and a turbo chiller (see FIG. 2), which are one of the compression type heat transfer devices, will be described with reference to examples.
図１は、本発明の熱搬送装置（下記説明では空気調和装置）における冷媒の循環経路の一態様を示す図である。空気調和装置１は、主として、圧縮機２と、四方切替弁３と、室外熱交換器４と、膨張機構５と、室内熱交換器６とから構成される。図１において、実線の矢印は、冷房運転時における冷媒の循環方向を表し、点線の矢印は、暖房運転時における冷媒の循環方向を表す。冷媒の循環方向は、圧縮機２から吐出された冷媒を四方切替弁３の操作により、室外熱交換器４又は室内熱交換機６のいずれかの方向に選択することにより制御することができる。 FIG. 1 is a diagram showing one aspect of a refrigerant circulation path in the heat transfer device (air conditioner in the following description) of the present invention. The air conditioner 1 is mainly composed of a compressor 2, a four-way switching valve 3, an outdoor heat exchanger 4, an expansion mechanism 5, and an indoor heat exchanger 6. In FIG. 1, the solid arrow indicates the refrigerant circulation direction during the cooling operation, and the dotted arrow indicates the refrigerant circulation direction during the heating operation. The circulation direction of the refrigerant can be controlled by selecting the refrigerant discharged from the compressor 2 in either the outdoor heat exchanger 4 or the indoor heat exchanger 6 by operating the four-way switching valve 3.
冷房運転時における空気調和装置１の冷凍サイクルについて説明する。最初に、圧縮機２は、低圧のガス冷媒を圧縮して、高圧のガス冷媒を吐出する。圧縮機２から吐出された冷媒は、四方切替弁３を通過して、室外熱交換器４に供給される。室外熱交換器４は、高圧のガス冷媒を凝縮して、高圧の液冷媒を吐出する。室外熱交換器４から吐出された冷媒は、膨張機構５の膨張弁を通過して低圧の気液混合状態の冷媒となり、室内熱交換器６に供給される。室内熱交換器６は、低圧の気液混合状態の冷媒を蒸発させて、低圧のガス冷媒を吐出する。室内熱交換器６から吐出された低圧のガス冷媒は、圧縮機２に供給される。この冷凍サイクルにより、室内を冷房運転することができる。 The refrigeration cycle of the air conditioner 1 during the cooling operation will be described. First, the compressor 2 compresses the low-pressure gas refrigerant and discharges the high-pressure gas refrigerant. The refrigerant discharged from the compressor 2 passes through the four-way switching valve 3 and is supplied to the outdoor heat exchanger 4. The outdoor heat exchanger 4 condenses the high-pressure gas refrigerant and discharges the high-pressure liquid refrigerant. The refrigerant discharged from the outdoor heat exchanger 4 passes through the expansion valve of the expansion mechanism 5 to become a low-pressure gas-liquid mixed refrigerant, which is supplied to the indoor heat exchanger 6. The indoor heat exchanger 6 evaporates the low-pressure gas-liquid mixed refrigerant and discharges the low-pressure gas refrigerant. The low-pressure gas refrigerant discharged from the indoor heat exchanger 6 is supplied to the compressor 2. This refrigeration cycle allows the room to be cooled.
冷房運転時は、室外熱交換器４は凝縮器として機能し、室内熱交換器６は蒸発器として機能する。即ち、室内熱交換器６で発生する冷媒の蒸発潜熱によって室内が冷却される。一方、暖房運転時は、四方切替弁３を切り換えることで、室外熱交換器４は蒸発器として機能し、室内熱交換器６は凝縮器として機能する。即ち、室外熱交換器４で発生する冷媒の凝縮潜熱によって、室内が加熱される。 During the cooling operation, the outdoor heat exchanger 4 functions as a condenser, and the indoor heat exchanger 6 functions as an evaporator. That is, the room is cooled by the latent heat of vaporization of the refrigerant generated in the room heat exchanger 6. On the other hand, during the heating operation, the outdoor heat exchanger 4 functions as an evaporator and the indoor heat exchanger 6 functions as a condenser by switching the four-way switching valve 3. That is, the room is heated by the latent heat of condensation of the refrigerant generated in the outdoor heat exchanger 4.
図２は、本発明の熱搬送装置（下記説明ではターボ冷凍機）における冷媒の循環経路の一態様を示す図である。ターボ冷凍機１’は、主として、圧縮機２’と、凝縮器４’と、膨張機構５’と、蒸発器６’とから構成される。 FIG. 2 is a diagram showing one aspect of a refrigerant circulation path in the heat transfer device (turbo chiller in the following description) of the present invention. The turbo chiller 1'mainly includes a compressor 2', a condenser 4', an expansion mechanism 5', and an evaporator 6'.
図２において、実線の矢印は、冷媒の循環方向を表す。この冷凍サイクルでは、圧縮機２’は、低圧のガス冷媒を圧縮して、高圧のガス冷媒を吐出する。圧縮機２’から吐出された冷媒は、凝縮器４’に供給される。凝縮器４’は、高圧のガス冷媒を凝縮して、高圧の液冷媒を吐出する。凝縮器４’から吐出された冷媒は、膨張機構５’の膨張弁を通過して低圧の気液混合状態の冷媒となり、蒸発器６’に供給される。蒸発器６’は、低圧の気液混合状態の冷媒を蒸発させて、低圧のガス冷媒を吐出する。蒸発器６’から吐出された低圧のガス冷媒は、圧縮機２’に供給される。この冷凍サイクルでは、蒸発器６’の機能により得られる冷水から作られる冷風が、大規模空間の冷房に用いられる。 In FIG. 2, the solid arrow indicates the circulation direction of the refrigerant. In this refrigeration cycle, the compressor 2'compresses the low pressure gas refrigerant and discharges the high pressure gas refrigerant. The refrigerant discharged from the compressor 2'is supplied to the condenser 4'. The condenser 4'condenses the high-pressure gas refrigerant and discharges the high-pressure liquid refrigerant. The refrigerant discharged from the condenser 4'passes through the expansion valve of the expansion mechanism 5'to become a low-pressure gas-liquid mixed state refrigerant, which is supplied to the evaporator 6'. The evaporator 6'evaporates the low-pressure gas-liquid mixed refrigerant and discharges the low-pressure gas refrigerant. The low-pressure gas refrigerant discharged from the evaporator 6'is supplied to the compressor 2'. In this refrigeration cycle, cold air produced from cold water obtained by the function of the evaporator 6'is used for cooling a large-scale space.
本発明の熱搬送装置は、冷媒の循環経路に存在する蒸発器と圧縮機との間に酸素吸着器を備える。図１では、冷房運転時は、室外熱交換器４は凝縮器として機能し、室内熱交換器６は蒸発器として機能するため、蒸発器６と圧縮機２との間に酸素吸着器７が備えられる。一方、暖房運転時は、室外熱交換器４は蒸発器として機能し、室内熱交換器６は凝縮器として機能するため、蒸発器４と圧縮機２との間に酸素吸着器８が備えられる。冷房運転時及び暖房運転時のいずれにおいても蒸発器と圧縮機との間は低圧のガス冷媒が存在しているためガス冷媒が酸素吸着器を通過することによりガス冷媒から酸素が除去される。他方、図２では、蒸発器６’と圧縮機２’との間に酸素吸着器７’が備えられる。 The heat transfer device of the present invention includes an oxygen adsorber between the evaporator and the compressor existing in the circulation path of the refrigerant. In FIG. 1, since the outdoor heat exchanger 4 functions as a condenser and the indoor heat exchanger 6 functions as an evaporator during the cooling operation, an oxygen adsorber 7 is provided between the evaporator 6 and the compressor 2. Be prepared. On the other hand, during the heating operation, the outdoor heat exchanger 4 functions as an evaporator and the indoor heat exchanger 6 functions as a condenser, so that an oxygen adsorber 8 is provided between the evaporator 4 and the compressor 2. .. Since a low-pressure gas refrigerant exists between the evaporator and the compressor in both the cooling operation and the heating operation, oxygen is removed from the gas refrigerant by passing the gas refrigerant through the oxygen adsorbent. On the other hand, in FIG. 2, an oxygen adsorber 7'is provided between the evaporator 6'and the compressor 2'.
なお、本発明の熱搬送装置は、酸素吸着器の前後にバルブ（図示せず）を設け、酸素吸着器を循環経路に対して着脱自在とすることで、酸素吸着器内の酸素を吸着した酸素吸着材の除去、交換等を容易に行うことができる。「バルブ」は、循環経路において酸素吸着器に対する冷媒の流出入を制御可能に設けられるものであればよく、手動、電動を問わない。また、例えば手動又は電動の弁も含むものである。 In the heat transfer device of the present invention, valves (not shown) are provided in front of and behind the oxygen adsorber, and the oxygen adsorber is detachable from the circulation path to adsorb oxygen in the oxygen adsorber. The oxygen adsorbent can be easily removed and replaced. The "valve" may be a valve that can control the inflow and outflow of the refrigerant to the oxygen adsorber in the circulation path, and may be manual or electric. It also includes, for example, manual or electric valves.
酸素吸着器は、その内部に酸素吸着材が充填されており、ガス冷媒とともに酸素が酸素吸着器を通過する際に酸素を選択的に吸着（吸収）してガス冷媒から除去される。かかる酸素吸着材としては、酸素を選択的に吸着できる材料であればよく、例えば、金属酸化物系酸素吸着材、有機系（糖系）酸素吸着材等が挙げられる。これらの酸素吸着材は、１種又は２種以上を混合して使用できるが、酸素の吸着速度が速い観点では金属酸化物系酸素吸着材が好ましい。酸素吸着材の形状はガス冷媒を透過できればよく、粉末、ペレット等の形状が挙げられる。また、酸素吸着材を付着又は含浸させたフィルム状やフィルター状の形態でも使用できる。本発明では、これらの酸素吸着材が充填された酸素吸着器を有することにより、循環経路における酸素含有量を好ましくは０．１体積％以下に維持でき、それによりＨＦＯ、ＨＣＦＯ及びＨＣＯの少なくとも一種を含有する冷媒の酸素に起因する経時的な分解を抑制することができる。 The oxygen adsorbent is filled with an oxygen adsorbent, and when oxygen passes through the oxygen adsorber together with the gas refrigerant, oxygen is selectively adsorbed (absorbed) and removed from the gas refrigerant. The oxygen adsorbent may be any material that can selectively adsorb oxygen, and examples thereof include metal oxide-based oxygen adsorbents and organic (sugar-based) oxygen adsorbents. These oxygen adsorbents can be used alone or in admixture of two or more, but a metal oxide-based oxygen adsorbent is preferable from the viewpoint of high oxygen adsorption rate. The shape of the oxygen adsorbent may be such that it can permeate the gas refrigerant, and examples thereof include powders and pellets. It can also be used in the form of a film or a filter impregnated with an oxygen adsorbent. In the present invention, by having an oxygen adsorber filled with these oxygen adsorbents, the oxygen content in the circulation pathway can be maintained preferably 0.1% by volume or less, whereby at least one of HFO, HCFO and HCO. Decomposition over time due to oxygen of the refrigerant containing the above can be suppressed.
上記金属酸化物系酸素吸着材は、酸化反応（発熱）により酸素を吸着する吸着材であり、本発明では、酸素を選択的に吸着する観点から、例えば、金属（Ｆｅ及び／又はＣｅ）酸化物系酸素吸着材が好適に使用できる。この金属酸化物系酸素吸着材としては、従来公知のものを幅広く利用することができる。 The metal oxide-based oxygen adsorbent is an adsorbent that adsorbs oxygen by an oxidation reaction (heat generation), and in the present invention, for example, metal (Fe and / or Ce) oxidation from the viewpoint of selectively adsorbing oxygen. A physical oxygen adsorbent can be preferably used. As the metal oxide-based oxygen adsorbent, conventionally known ones can be widely used.
上記有機系（糖系）酸素吸着材は、酸化反応（ＣＯ２放出）により酸素をガス冷媒から除去する吸着材である。この有機系（糖系）酸素吸着材としては、従来公知のものを幅広く利用することができる。 The organic (sugar-based) oxygen adsorbent is an adsorbent that removes oxygen from the gas refrigerant by an oxidation reaction (CO 2 release). As the organic (sugar-based) oxygen adsorbent, conventionally known ones can be widely used.
本発明で用いる酸素吸着器は、上記酸素吸着材を充填する専用の部材であってもよく、公知の熱搬送装置において冷媒の循環経路に設置される乾燥器（いわゆるドライヤー）を兼用する形で酸素吸着器としてもよい。この場合には、乾燥器内に乾燥材とともに酸素吸着材を充填することにより、ガス冷媒に混入した水分及び酸素を同時に除去する部材として用いることができる。 The oxygen adsorber used in the present invention may be a dedicated member for filling the oxygen adsorbent, and also serves as a dryer (so-called dryer) installed in the circulation path of the refrigerant in a known heat transfer device. It may be an oxygen adsorber. In this case, by filling the dryer with an oxygen adsorbent together with the desiccant, it can be used as a member for simultaneously removing water and oxygen mixed in the gas refrigerant.
本発明の熱搬送装置は、圧縮機において冷媒を圧縮する圧縮部を駆動するモーターの回転軸を支持する軸受として磁気軸受、セラミック軸受又は空気軸受を採用することにより、冷媒１００重量部に対する冷凍機油の使用量を５重量部以下に制限したいわゆるオイルフリーの熱搬送装置であってもよい。上記の軸受を使用する場合には、軸受の潤滑性を向上させるために冷媒に加えて冷凍機油を併用する必要がなく、実質的に冷凍機油の含有量を０重量部にすることができるが、熱搬送装置を組み立てる際の油分（グリース等）の混入を考慮すると５重量部以下が好ましい。 The heat transfer device of the present invention employs a magnetic bearing, a ceramic bearing, or an air bearing as a bearing for supporting the rotation shaft of the motor that drives the compression unit that compresses the refrigerant in the compressor, whereby the refrigerating machine oil for 100 parts by weight of the refrigerant is used. A so-called oil-free heat transfer device may be used in which the amount of the bearing is limited to 5 parts by weight or less. When the above bearings are used, it is not necessary to use refrigerating machine oil in addition to the refrigerant in order to improve the lubricity of the bearings, and the content of refrigerating machine oil can be substantially reduced to 0 parts by weight. Considering the mixing of oil (grease, etc.) when assembling the heat transfer device, 5 parts by weight or less is preferable.
≪実施形態２の熱搬送装置≫
実施形態２の熱搬送装置は、ハイドロフルオロオレフィン（ＨＦＯ）、ハイドロクロロフルオロオレフィン（ＨＣＦＯ）及びハイドロクロロオレフィン（ＨＣＯ）の少なくとも一種を含有する冷媒が循環経路に封入された熱搬送装置であって、
前記装置は、前記循環経路中、圧力１．０ＭＰａ以下の領域に酸素吸着器を備える、
ことを特徴とする。
<< Heat Transfer Device of Embodiment 2 >>
The heat transfer device of the second embodiment is a heat transfer device in which a refrigerant containing at least one of hydrofluoroolefin (HFO), hydrochlorofluoroolefin (HCFO) and hydrochloroolefin (HCO) is sealed in a circulation path. ,
The apparatus includes an oxygen adsorber in a region where the pressure is 1.0 MPa or less in the circulation path.
It is characterized by that.
実施形態２の熱搬送装置は、冷媒の循環経路において圧力１．０ＭＰａ以下の低圧領域に酸素吸着器を備える点以外は特に限定されず、その他は実施形態１の熱搬送装置と同じ構成とすることができる。冷媒の循環経路において、圧力１．０ＭＰａ以下の低圧領域は他の領域（圧力１．０ＭＰａ超過の領域）と比べて外気を吸い込むリスクが高まり、循環経路に酸素が入り込み易いおそれがある。そのため、かかる低圧領域に酸素吸着器を設けることにより酸素混入による影響を効率的に回避できる利点がある。なお、冷媒回路全体における最大圧力は限定されないが、通常３．０ＭＰａ程度である。 The heat transfer device of the second embodiment is not particularly limited except that an oxygen adsorber is provided in a low pressure region of 1.0 MPa or less in the refrigerant circulation path, and has the same configuration as the heat transfer device of the first embodiment. be able to. In the refrigerant circulation path, the low pressure region having a pressure of 1.0 MPa or less has a higher risk of sucking in outside air than other regions (regions having a pressure exceeding 1.0 MPa), and oxygen may easily enter the circulation path. Therefore, by providing an oxygen adsorber in such a low pressure region, there is an advantage that the influence of oxygen mixing can be efficiently avoided. The maximum pressure in the entire refrigerant circuit is not limited, but is usually about 3.0 MPa.
実施形態２の熱搬送装置は、冷媒の循環経路に酸素吸着器を備えており、その備える場所については圧力１．０ＭＰａ以下の低圧領域である限り限定されないが、冷媒及び酸素がガス状態で存在する場所であれば効率的に酸素を吸着することができるため、実施形態１の熱搬送装置の場合と同様に、蒸発器と圧縮機との間で且つ圧力１．０ＭＰａ以下の低圧領域に酸素吸着器を備える態様が好ましい。実施形態２においても、酸素吸着材が充填された酸素吸着器を有することにより、循環経路における酸素含有量を好ましくは０．１体積％以下に維持でき、それによりＨＦＯ、ＨＣＦＯ及びＨＣＯの少なくとも一種を含有する冷媒の酸素に起因する経時的な分解を抑制することができる。 The heat transfer device of the second embodiment includes an oxygen adsorber in the circulation path of the refrigerant, and the location of the oxygen adsorbent is not limited as long as it is in a low pressure region of 1.0 MPa or less, but the refrigerant and oxygen are present in a gas state. Since oxygen can be efficiently adsorbed in a place where oxygen is generated, oxygen can be efficiently adsorbed in a low pressure region between the evaporator and the compressor and at a pressure of 1.0 MPa or less, as in the case of the heat transfer device of the first embodiment. An embodiment provided with an adsorber is preferable. Also in the second embodiment, by having the oxygen adsorber filled with the oxygen adsorbent, the oxygen content in the circulation path can be maintained preferably 0.1% by volume or less, whereby at least one of HFO, HCFO and HCO. Decomposition over time due to oxygen of the refrigerant containing the above can be suppressed.
本発明の熱搬送方法
本発明の熱搬送装置における冷媒の循環経路に冷媒を循環させることにより、本発明の熱搬送方法を実施することができる。冷媒の循環については、具体的には、空気調和装置（図１参照）及びターボ冷凍機（図２参照）について例を挙げて前述した通りである。
The heat transfer method of the present invention The heat transfer method of the present invention can be carried out by circulating the refrigerant in the circulation path of the refrigerant in the heat transfer device of the present invention. The circulation of the refrigerant is specifically as described above with reference to an air conditioner (see FIG. 1) and a turbo chiller (see FIG. 2).
１．熱搬送装置（図１では空気調和装置）
２．圧縮機
３．四方切替弁
４．室外熱交換器（冷房運転時の凝縮器、暖房運転時の蒸発器）
５．膨張機構
６．室内熱交換機（冷房運転時の蒸発器、暖房運転時の凝縮器）
７．酸素吸着器（冷房運転時）
８．酸素吸着器（暖房運転時）
１’．熱搬送装置（図２ではターボ冷凍機）
２’．圧縮機
４’．凝縮器
５’．膨張機構
６’．蒸発器
７’．酸素吸着器
1. 1. Heat transfer device (air conditioner in Fig. 1)
2. Compressor 3. Four-way switching valve 4. Outdoor heat exchanger (condenser during cooling operation, evaporator during heating operation)
5. Expansion mechanism 6. Indoor heat exchanger (evaporator during cooling operation, condenser during heating operation)
7. Oxygen adsorber (during cooling operation)
8. Oxygen adsorber (during heating operation)
1'. Heat transfer device (turbo chiller in Fig. 2)
2'. Compressor 4'. Condenser 5'. Expansion mechanism 6'. Evaporator 7'. Oxygen adsorber
Claims (6)
前記熱搬送装置は、チラーで且つターボ冷凍機であり、
前記装置は、前記循環経路の主回路において、前記主回路に存在する蒸発器と圧縮機との間で且つその循環経路外に対して負圧になる領域に酸素吸着器を備え、
更に前記主回路における前記酸素吸着器の前後に前記酸素吸着器が前記主回路に対して脱着自在となるようにバルブを備える、
ことを特徴とする熱搬送装置。 A heat transfer device in which a refrigerant containing hydrochlorofluoroolefin (HCFO) is sealed in a circulation path.
The heat transfer device is a chiller and a turbo chiller.
The device, in the main circuit of the circulation path, and Bei example oxygen adsorber in a region to be a negative pressure with respect to the circulation path out between the evaporator and compressor present in the main circuit,
Further, a valve is provided before and after the oxygen adsorber in the main circuit so that the oxygen adsorber can be attached to and detached from the main circuit.
A heat transfer device characterized in that.
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